I got the game, its pretty fun! Will the campaign mode only allow you to play as Ally forces, or will it be expanded an update/ add on?

Any plans for multiplayer?

Also, there are some aspects of the game that are not explained in the campaign tutorial, in the games virtual manual, or in the 'help' section inside the game. A ships 'armor' a ships 'HP', the captains 'level', and in general the guns and other weapons dont really have any info about them other than what you see on the card. And many 'classes' of destroyers appear to be exactly the same in all of the stats listed on the card.

Will more info about the stats of the ships and differences between classes be added in? Are there any explanations available right now that people can see?

Can you change history and defeat the combined naval forces of the British Empire and its American allies?

New convoy mechanics have been added - large supply convoys from the US and the British colonies will continually reinforce the mainland unless you can intercept and sink them.

Extra submarine mechanics let you strike and withdraw all the easier by diving out of sight.

Hard and Expert campaign modes

These pit you against more numerous and higher level enemies from the get go. In addition the enemy supply lines will be more resilient to your attacks.

You'll also have to be more careful with your fleet as repairs can only be carried out by using up friendly port supplies. Similarly new ships can only be requisitioned from well supplied ports, with battlecruisers and battleships requiring a higher level, well stocked port.

Other changes:

- Added gameplay option to disable planes in night battles.
- Added gameplay option to show A/B and X/Y turret groups as separate weapons.
- Hard/Expert mode captains must purchase landing craft from the shipyard before engaging in port attacks.
- Deep dive mode added for submarines, unable to fire torpedoes but harder to detect. Submarines in deep dive can retreat from the battlefield after 30s undetected.
- Loose formations - group your ships into a loose formation, no circle/lines just a handy selection.
- Initial load of the shipyard screen should be much much faster.
- Right clicking to fire all weapons will first fire any guns in range/arc, if no guns available will fire torpedoes, if no guns or torpedos available will fire depth charges/hedgehogs.
- Ally ships not under your control are faded out on tactical view to reduce confusion.
- Added the type VII U-Boat
- AI destroyers in formation will now deviate from formation to chase subs.
- Increased chance of crits from torpedoes, slightly.
- Increased speed of AA fire.
- Some criticals were incorrectly doing too much crew damage, fixed.
- Enemy ships will now group into formations.
- Friendly AI submarines will deploy nearer the enemy
- Crippled submarines will correctly surface from deep dive and no longer start battles submerged or able to be positioned anywhere.